US20020044217A1 - Signal processing unit for a digital TV system - Google Patents
Signal processing unit for a digital TV system Download PDFInfo
- Publication number
- US20020044217A1 US20020044217A1 US09/894,815 US89481501A US2002044217A1 US 20020044217 A1 US20020044217 A1 US 20020044217A1 US 89481501 A US89481501 A US 89481501A US 2002044217 A1 US2002044217 A1 US 2002044217A1
- Authority
- US
- United States
- Prior art keywords
- picture
- video signal
- pictures
- frame rate
- pixel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 11
- 238000011156 evaluation Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000750 progressive effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000005236 sound signal Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
- H04N7/0132—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter the field or frame frequency of the incoming video signal being multiplied by a positive integer, e.g. for flicker reduction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
Definitions
- the invention relates to a signal processing unit for a digital TV system.
- Digital TV systems differ from the more familiar analog television systems by virtue of the almost exclusive digital processing and conditioning of the picture and sound signals that are transmitted or made available via various media such as satellite, cable, antenna, CD-ROM, DVD, etc.
- these signals are digitally coded and compressed according to a specific standard (for example DVB-T or MPEG-2 or the like), and optionally encrypted.
- a specific standard for example DVB-T or MPEG-2 or the like
- the systems of this type thus require complex signal processing which, in practice, can only be realized digitally.
- the invention is based on developing a signal processing unit for a digital TV system in such a way that, with relatively little additional outlay, the frame rate can be increased in order to improve the picture impression.
- a signal processing unit comprises a first device for acting on a video signal, for example, by overlaying graphical picture elements and text characters onto the video signal.
- a second device converts the frame-rate and picture-format of the signal after processing by the first device. The output of the second device is applied to a driver stage for driving a display.
- a common picture storage device is connected to the first and second devices for storing and sharing picture data, minimizing the need for additional components.
- At least one input stage receives compressed picture data from at least one transmission medium. Also, at least one decoding unit converts the compressed picture data into digital pixel data of an overall data stream which is fed to the first device.
- FIG. 1 is a block diagram showing the basic structure of an embodiment of the present invention.
- FIG. 2 is a block diagram of the embodiment in accordance with FIG. 1.
- the data streams may be modulated by known digital methods such as QPSK, QAM, COFDM, and optionally compressed using techniques such as MPEG-1, MPEG-2. New transmission standards such as DVB-T, etc., may also be realized.
- the input stages 1 are followed by one or more decoding units 2 .
- the decoder units 2 serve, for example, to convert compressed picture data into digital pixel data, and to combine the various individual data streams (picture and sound signal) to form an overall data stream.
- the decoding units 2 may comprise, for example, an MPEG-2 decoder and various audio signal decoders, e.g. for stereo, surround, etc.
- the digital video signal (YUV signal) present at the output of the decoding units 2 is then fed to a first device 3 .
- the first device 3 overlays graphical picture element and text character signals onto the digital video signal.
- Such processing may involve, for example, Internet browsers or other graphical user interfaces via which interactive communication of the user via a telephone line or the like is possible.
- a second device 4 for converting the frame-rate is connected to the output of the first device 3 .
- This second device 4 converts the output signal of the first device 3 , which, for example, comprises a frame refresh frequency of 50 (60) Hz, into a 100 (120) Hz picture signal.
- Frame rate conversion can be done, for example, either by repetition of the preceding picture or by motion estimation and picture interpolation. These two methods are known per se from analog television picture processing.
- the decoding units 2 and the first and second devices 3 , 4 are connected to a common picture storage device 5 , thereby enabling a significant saving of components.
- the output signal of the second device is finally fed to a driver unit 6 , to which a display is connected.
- FIG. 2 shows the interconnection of the individual blocks in detail.
- Three input stages 11 , 12 , 13 are provided, each of which is adapted to a different program source such as CD-ROM, DVD, satellite antenna, cable, etc.
- the output signals of these input stages are fed for example as 50 Hz MPEG data streams to the downstream digital decoding units 21 , 22 , which are also connected to one another.
- the decoded picture signals then pass to the first device 3 for acting on the video signal with the abovementioned graphical picture elements and text characters.
- the second device 4 Connected to the first device 3 is the second device 4 for frame-rate conversion in the manner described above, whose output signal is fed to the driver unit 6 .
- a display 6 a and also loudspeakers 6 b are connected to the driver unit.
- FIG. 2 also shows the common picture storage device 5 , which can be accessed both by the decoding units 21 , 22 and by the first and second devices 3 , 4 .
- the second device is also capable of freely varying the picture format, using pixel intermediate values stored in the picture storage device, where the pixel intermediate values have been calculated by motion evaluation and pixel interpolation based on preceding pictures.
- the second device converts the picture scan mode of the incoming video signal from interlaced to progressive scan.
- Intermediate pictures calculated by motion evaluation and picture interpolation based on preceding pictures, are retrieved from the picture storage device and reproduced, the intermediate pictures.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Television Signal Processing For Recording (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Description
- The invention relates to a signal processing unit for a digital TV system.
- Digital TV systems differ from the more familiar analog television systems by virtue of the almost exclusive digital processing and conditioning of the picture and sound signals that are transmitted or made available via various media such as satellite, cable, antenna, CD-ROM, DVD, etc. In general, these signals are digitally coded and compressed according to a specific standard (for example DVB-T or MPEG-2 or the like), and optionally encrypted. The systems of this type thus require complex signal processing which, in practice, can only be realized digitally.
- The invention is based on developing a signal processing unit for a digital TV system in such a way that, with relatively little additional outlay, the frame rate can be increased in order to improve the picture impression.
- In accordance with an embodiment of the present invention, a signal processing unit comprises a first device for acting on a video signal, for example, by overlaying graphical picture elements and text characters onto the video signal. A second device converts the frame-rate and picture-format of the signal after processing by the first device. The output of the second device is applied to a driver stage for driving a display.
- Because frame-rate conversion occurs at the end of the processing chain and, consequently, after all graphics operations, graphics operations can be performed at the lower frame rate, such that the speed requirements of these circuits are not particularly stringent or do not have to be increased. Furthermore, only one circuit is required for frame-rate conversion, which processes the whole signal (that is to say, video picture data overlayed with graphics and/or text data).
- Preferably, a common picture storage device is connected to the first and second devices for storing and sharing picture data, minimizing the need for additional components.
- Furthermore, at least one input stage receives compressed picture data from at least one transmission medium. Also, at least one decoding unit converts the compressed picture data into digital pixel data of an overall data stream which is fed to the first device.
- The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
- FIG. 1 is a block diagram showing the basic structure of an embodiment of the present invention.
- FIG. 2 is a block diagram of the embodiment in accordance with FIG. 1.
- A description of preferred embodiments of the invention follows.
- In accordance with FIG. 1, a signal processing unit, according to the invention, for a digital TV system comprises a plurality of
input stages 1 for TV data streams from different sources. This may involve corresponding tuners for reception via antenna, cable or satellite or other input stages for the connection of drives for CD-ROMs, DVDs, etc. In this case, the data streams may be modulated by known digital methods such as QPSK, QAM, COFDM, and optionally compressed using techniques such as MPEG-1, MPEG-2. New transmission standards such as DVB-T, etc., may also be realized. - The
input stages 1 are followed by one ormore decoding units 2. Thedecoder units 2 serve, for example, to convert compressed picture data into digital pixel data, and to combine the various individual data streams (picture and sound signal) to form an overall data stream. For this purpose, thedecoding units 2 may comprise, for example, an MPEG-2 decoder and various audio signal decoders, e.g. for stereo, surround, etc. - The digital video signal (YUV signal) present at the output of the
decoding units 2 is then fed to afirst device 3. Thefirst device 3 overlays graphical picture element and text character signals onto the digital video signal. Such processing may involve, for example, Internet browsers or other graphical user interfaces via which interactive communication of the user via a telephone line or the like is possible. - A
second device 4 for converting the frame-rate is connected to the output of thefirst device 3. Thissecond device 4 converts the output signal of thefirst device 3, which, for example, comprises a frame refresh frequency of 50 (60) Hz, into a 100 (120) Hz picture signal. Frame rate conversion can be done, for example, either by repetition of the preceding picture or by motion estimation and picture interpolation. These two methods are known per se from analog television picture processing. - The
decoding units 2 and the first andsecond devices picture storage device 5, thereby enabling a significant saving of components. The output signal of the second device is finally fed to adriver unit 6, to which a display is connected. - FIG. 2 shows the interconnection of the individual blocks in detail. Three
input stages - The output signals of these input stages are fed for example as 50 Hz MPEG data streams to the downstream
digital decoding units - The decoded picture signals then pass to the
first device 3 for acting on the video signal with the abovementioned graphical picture elements and text characters. - Connected to the
first device 3 is thesecond device 4 for frame-rate conversion in the manner described above, whose output signal is fed to thedriver unit 6. Adisplay 6 a and alsoloudspeakers 6 b are connected to the driver unit. - FIG. 2 also shows the common
picture storage device 5, which can be accessed both by thedecoding units second devices - Beyond merely converting the frame rate, the second device is also capable of freely varying the picture format, using pixel intermediate values stored in the picture storage device, where the pixel intermediate values have been calculated by motion evaluation and pixel interpolation based on preceding pictures.
- In particular, in one embodiment, the second device converts the picture scan mode of the incoming video signal from interlaced to progressive scan. Intermediate pictures, calculated by motion evaluation and picture interpolation based on preceding pictures, are retrieved from the picture storage device and reproduced, the intermediate pictures.
- While this invention has been particularly shown and described with references to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
Claims (14)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEDE19900136.7 | 1999-01-05 | ||
DE19900136 | 1999-01-05 | ||
PCT/DE2000/000037 WO2000041389A1 (en) | 1999-01-05 | 2000-01-04 | Signal processing unit for a digital tv system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/000037 Continuation WO2000041389A1 (en) | 1999-01-05 | 2000-01-04 | Signal processing unit for a digital tv system |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020044217A1 true US20020044217A1 (en) | 2002-04-18 |
US7034889B2 US7034889B2 (en) | 2006-04-25 |
Family
ID=7893606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/894,815 Expired - Lifetime US7034889B2 (en) | 1999-01-05 | 2001-06-28 | Signal processing unit and method for a digital TV system with an increased frame rate video signal |
Country Status (7)
Country | Link |
---|---|
US (1) | US7034889B2 (en) |
EP (1) | EP1142317B1 (en) |
JP (1) | JP2002534916A (en) |
KR (1) | KR100420982B1 (en) |
CN (1) | CN1217535C (en) |
DE (1) | DE50000200D1 (en) |
WO (1) | WO2000041389A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070086750A1 (en) * | 2005-10-14 | 2007-04-19 | Jovial Technologies | Wireless car digital audio/video system and its method |
US20080008144A1 (en) * | 2006-07-06 | 2008-01-10 | Sin Etke Technology Co., Ltd. | Mobile video system for vehicles |
US20110194616A1 (en) * | 2008-10-01 | 2011-08-11 | Nxp B.V. | Embedded video compression for hybrid contents |
US9030612B2 (en) | 2009-05-08 | 2015-05-12 | Samsung Electronics Co., Ltd. | Display apparatus having display driving unit on lower part |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US7962011B2 (en) | 2001-12-06 | 2011-06-14 | Plourde Jr Harold J | Controlling substantially constant buffer capacity for personal video recording with consistent user interface of available disk space |
JP4120265B2 (en) * | 2002-05-23 | 2008-07-16 | ソニー株式会社 | Signal processing apparatus and method, and program thereof |
US7391469B2 (en) * | 2003-10-05 | 2008-06-24 | Mediatek Inc. | Method and apparatus for video decoding and de-interlacing |
KR100774457B1 (en) * | 2006-02-14 | 2007-11-08 | 엘지전자 주식회사 | Apparatus and method for compensating video signal |
DE102013114794A1 (en) | 2013-10-10 | 2015-04-16 | Elmos Semiconductor Aktiengesellschaft | Crooked screen |
JP6362116B2 (en) * | 2016-11-30 | 2018-07-25 | キヤノン株式会社 | Display device, control method therefor, program, and storage medium |
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- 2000-01-04 WO PCT/DE2000/000037 patent/WO2000041389A1/en active IP Right Grant
- 2000-01-04 CN CN008021805A patent/CN1217535C/en not_active Expired - Fee Related
- 2000-01-04 JP JP2000593018A patent/JP2002534916A/en active Pending
- 2000-01-04 DE DE50000200T patent/DE50000200D1/en not_active Expired - Lifetime
- 2000-01-04 KR KR10-2001-7007804A patent/KR100420982B1/en not_active IP Right Cessation
- 2000-01-04 EP EP00904834A patent/EP1142317B1/en not_active Expired - Lifetime
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2001
- 2001-06-28 US US09/894,815 patent/US7034889B2/en not_active Expired - Lifetime
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US5808617A (en) * | 1995-08-04 | 1998-09-15 | Microsoft Corporation | Method and system for depth complexity reduction in a graphics rendering system |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070086750A1 (en) * | 2005-10-14 | 2007-04-19 | Jovial Technologies | Wireless car digital audio/video system and its method |
US8065706B2 (en) * | 2005-10-14 | 2011-11-22 | Funtoro Inc. | Wireless car digital audio/video system and its method |
US20080008144A1 (en) * | 2006-07-06 | 2008-01-10 | Sin Etke Technology Co., Ltd. | Mobile video system for vehicles |
US20110194616A1 (en) * | 2008-10-01 | 2011-08-11 | Nxp B.V. | Embedded video compression for hybrid contents |
US9030612B2 (en) | 2009-05-08 | 2015-05-12 | Samsung Electronics Co., Ltd. | Display apparatus having display driving unit on lower part |
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Also Published As
Publication number | Publication date |
---|---|
KR100420982B1 (en) | 2004-03-02 |
CN1217535C (en) | 2005-08-31 |
CN1327677A (en) | 2001-12-19 |
WO2000041389A1 (en) | 2000-07-13 |
EP1142317A1 (en) | 2001-10-10 |
EP1142317B1 (en) | 2002-06-05 |
DE50000200D1 (en) | 2002-07-11 |
KR20010089660A (en) | 2001-10-08 |
US7034889B2 (en) | 2006-04-25 |
JP2002534916A (en) | 2002-10-15 |
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